Dogcows Code - chaz/yoink/blob - src/Moof/Transition.hh

   1
   2 /*******************************************************************************
   3
   4  Copyright (c) 2009, Charles McGarvey
   5  All rights reserved.
   6
   7  Redistribution   and   use  in  source  and  binary  forms,  with  or  without
   8  modification, are permitted provided that the following conditions are met:
   9
  10    * Redistributions  of  source  code  must retain the above copyright notice,
  11      this list of conditions and the following disclaimer.
  12    * Redistributions  in binary form must reproduce the above copyright notice,
  13      this  list of conditions and the following disclaimer in the documentation
  14      and/or other materials provided with the distribution.
  15
  16  THIS  SOFTWARE  IS  PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  17  AND  ANY  EXPRESS  OR  IMPLIED  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  18  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  19  DISCLAIMED.  IN  NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
  20  FOR  ANY  DIRECT,  INDIRECT,  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  21  DAMAGES  (INCLUDING,  BUT  NOT  LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  22  SERVICES;  LOSS  OF  USE,  DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  23  CAUSED  AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  24  OR  TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  25  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  26
  27 *******************************************************************************/
  28
  29 #ifndef _MOOF_TRANSITION_HH_
  30 #define _MOOF_TRANSITION_HH_
  31
  32 #include <boost/shared_ptr.hpp>
  33
  34 #include <Moof/Engine.hh>
  35 #include <Moof/Interpolator.hh>
  36 #include <Moof/Layer.hh>
  37 #include <Moof/Log.hh>
  38 #include <Moof/Math.hh>
  39 #include <Moof/OpenGL.hh>
  40 #include <Moof/Texture.hh>
  41
  42
  43 namespace Mf {
  44
  45
  46 template <typename T>
  47 class Transition : public Layer
  48 {
  49         LayerP  mTo;
  50         LayerP  mFrom;
  51
  52         T               mInterp;
  53
  54 public:
  55
  56         Transition(LayerP t, LayerP f, const T& interp) :
  57                 mTo(t),
  58                 mFrom(f),
  59                 mInterp(interp) {}
  60
  61         typedef boost::shared_ptr<Transition> Ptr;
  62
  63         static Ptr alloc(LayerP t, LayerP f, const T& interp)
  64         {
  65                 return Ptr(new Transition(t, f, interp));
  66         }
  67
  68
  69         void popped(Engine& engine)
  70         {
  71                 if (mTo) engine.push(mTo);
  72         }
  73
  74         void update(Engine& engine, Scalar t, Scalar dt)
  75         {
  76                 mInterp.update(t, dt);
  77
  78                 if (mFrom) mFrom->update(engine, t, dt);
  79                 if (mTo) mTo->update(engine, t, dt);
  80
  81                 if (mInterp.isDone())
  82                 {
  83                         // to should /replace/ this
  84                         engine.pop(this);
  85                 }
  86         }
  87
  88         void drawFade(Scalar alpha) const
  89         {
  90                 // DRAW FADE
  91                 glDisable(GL_DEPTH_TEST);
  92                 glDisable(GL_ALPHA_TEST);
  93                 glEnable(GL_BLEND);
  94                 glMatrixMode(GL_PROJECTION);
  95                 glPushMatrix();
  96                 glLoadIdentity();
  97                 glMatrixMode(GL_MODELVIEW);
  98                 glPushMatrix();
  99                 glLoadIdentity();
 100                 glColor(1.0, 1.0, 1.0, alpha);
 101                 Mf::Texture::resetBind();
 102
 103                 //glRectf(-1.0f, -1.0f, 1.0f, 1.0f);
 104                 glBegin(GL_QUADS);
 105                         glVertex(-1.0, -1.0, -0.1);
 106                         glVertex(1.0, -1.0, -0.1);
 107                         glVertex(1.0, 1.0, -0.1);
 108                         glVertex(-1.0, 1.0, -0.1);
 109                 glEnd();
 110
 111                 glDisable(GL_BLEND);
 112                 glEnable(GL_DEPTH_TEST);
 113                 glEnable(GL_ALPHA_TEST);
 114
 115                 glMatrixMode(GL_PROJECTION);
 116                 glPopMatrix();
 117                 glMatrixMode(GL_MODELVIEW);
 118                 glPopMatrix();
 119         }
 120
 121         void draw(Engine& engine, Scalar alpha) const
 122         {
 123                 Scalar a = mInterp.getState(alpha);
 124                 logDebug << "transition state: " << a << std::endl;
 125
 126                 //glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
 127
 128                 if (mFrom)
 129                 {
 130                         glPushMatrix();
 131                         glLoadIdentity();
 132                         glRotate(180.0 * a, 0.0, 1.0, 0.0);
 133                         mFrom->draw(engine, alpha);
 134                         glPopMatrix();
 135                 }
 136                         //drawFade(a);
 137
 138                 if (mTo)
 139                 {
 140                         glPushMatrix();
 141                         glLoadIdentity();
 142                         glRotate(180.0 * (1.0 - a), 0.0, 1.0, 0.0);
 143                         mTo->draw(engine, alpha);
 144                         glPopMatrix();
 145                 }
 146                         //drawFade(1.0 - a);
 147         }
 148
 149         bool handleEvent(Engine& engine, const Event& event)
 150         {
 151                 if (mTo)
 152                 {
 153                         return mTo->handleEvent(engine, event);
 154                 }
 155                 else if (mFrom)
 156                 {
 157                         return mFrom->handleEvent(engine, event);
 158                 }
 159                 return false;
 160         }
 161 };
 162
 163
 164 } // namespace Mf
 165
 166 #endif // _MOOF_TRANSITION_HH_
 167
 168 /** vim: set ts=4 sw=4 tw=80: *************************************************/
 169